the stock taper goes the opposite way, if you re-taper it going down, you get a XXXXed up hole that only contacts the tre over like a 1/32". you gotta drill it out, and weld in an insert, like many people do for 1-ton OTK steering setups.... you'll probably find out a bunch of stuff hits, but without prior experience with that specific steering, i cant tell you what. if i had to guess, i'd say sway bar mounts, possibly coil buckets and stock trackbar mount...
in other words,. this is a lot of work, to run stock steering? sounds retarded. your location says UK, you RHD or LHD? that can complicate things EVEN MORE...